Sponge



FIG. 1 is a perspective view of the sponge showing our new design;

FIG. 2 is a top plan view of the sponge;

FIG. 3 is a bottom plan view of the sponge;

FIG. 4 is a right end view of the sponge;

FIG. 5 is a left end view of the sponge;

FIG. 6 is a left side view of the sponge; and,

FIG. 7 is a right side view of the sponge. 

The ornamental design for a sponge, as shown and described. 